I quite like ours...
We've got 3 of the 84" screens and 11 of the 55" ones, and they're great. You can connect wirelessly, or with cables, when you schedule the meeting, the room is invited to it and the Surface just becomes a medium for the meeting to happen in. It's part of the Skype conference, so everyone can see what's presented, you can see and hear the people who aren't in the room. Used properly, they're actually a really good collaboration tool.
*I'm not paid by Microsoft, but am entirely open to bribery..